Fluid pressure operated blower for



R. l. MOSES 2,002,787 FLUID PRESSURE OPERATED BLOWER FOR CLEANING THE May 28, 1935.

TUBES OF STEAM GENERATORS AND THE LIKE Filed Dec. 27, 1932 iiii" RI HARD IVOR Moss's Patented May 28, 1935 UNITED STATES FLUID PRESSURE OPERATED BLOWER FOR CLEANING THE TUBES OF STEAM GEN-'- ERATORS AND THE LIKE Richard Ivor Moses, Stockton-bn-Tces, England Application December 27, 1932, Serial No. 648,922 In Great Britain December 30, 1931 2 Claims. (01. 122-392) My invention relates to fluid pressure Opt-31'. ated blowers for cleaning the tubesof steam generators and the like, and has for its principal object to provide means whereby the tubular members of the blower may be kept cool when the device is inoperative as a blower.

. A further object of the invention isto provide a blower of strong and robust construction, and one which is highly economical in use, and further wherein the operative parts are adapted to be resiliently supported from the generator setting or other part.

The present invention consists in a fluid pressure operated blower for cleaning the tubes ofsteam generators and the like comprising a casing adapted to be secured to the wall of the steam generator, two tubular members one of which passes through and extends from said casing into the steam generator, the second tubular member also fitting into the casing being external of the first and in fixed relation thereto to define an annular space therebetween, a plurality ofnozzles communicating with the interior of the first tubular member, a plurality of apertures in the wall of the second tubular member, said nozzles passing through said apertures, the first tubular member being adapted to supply pressuremedium only to said noz+ zles, diaphragms interposed between the outer tubular member and the inner tubular membar to divide the said annular space into two longitudinal passages, packing: means in said casing for the ends of both tubular members, a chest in said casing for the pressure medium,

1 an inlet for the pressure medium to said chest, two outlets for the pressure medium from said chest, one of which is in communication with the inner tubular member, and the other with one passage in the space between the tubular members, means common to'both outletsfor selectively admitting pressure medium either to the inner tubular member or to one passage formed by the division of the annular space, an outlet in said casin'gys'aid outlet communieating with the second passage in the space between said tubular members whereby the pressure medium may flow continuously: from the inlet to the outlet through said passages when admitted thereto by saida'drnitting means,

' and means for rotating said tubular members in unison. I l I Other features of the invention will be ap parent from the following description.

In order thatm y invention may be more clear 1y understood flandxreadily' carried lnto' practice, a preferred form will now be describedwitli reference to the accompanying drawing, wherein:--

Fig; 1 is a side elevation partly sectional of a soot blower constructed accordingto my in-- vention;

Fig. 2 is a section on the line Il Il'of Fig ure 1 looking in the directionof the arrows;

Fig. 3 is a sectional plan taken on the line III-III of Figure 1;

Figs. 4 to '7 are transverse sections of details. j

correweldless steel tubing, the said conduit being concentrically disposed within an outer tubularmernber 2. Thesetubular members are adapted for rotary movement within a frame casting 3',

resiliently supported within a Wall box 4 pro vided in the boiler seating 5.

The outer end of the central tube. by a screwed and welded plug 6. The opposite ends of boththe central conduit I and the outer tubular member 2 are closed by a second plug 8, the smaller diameter of which is screwed to err-'- gage the corresponding end of the central conduit I. This plug 8 is further secured by means of pins 9 and may be welded at I!) for greater security.

The conduit l is formed or provided with two webs l2 and I3, (see Figsl to 4) extending substantially the whole length of the member 2, be

ing stopped off however, at l4 near the forward end of the blower to define two passages l6 and I1. between the tubular members I and 2. Both the webs i2 and I3, are preferably welded to the conduit l. The outer end of the passage I6 is closed by the semi-annular plug The web-l3 is enlargedat intervals ofits length to define bosses 22 each of which is bored at 23, and with correspondinglborings in the inner tube and the outer tubular member 2, constitute outlet n02- zles for the steam or other cleansing fluid to the boiler tubes. Theboringsin' the tubular member 2' may be somewhat larger than that in the main bore, the annulus so formed being filled in by a welding operation. I

The frame casting a is formed with a flange 24 adapted to receive pillar studs 25 and 235 to which are secured an extension 21, comprising a steam chest 28with a cover 30, the said steam chest having an inlet 32 for steam or other pres- I; is closed sure medium to either port being controlled by a valve 45 carried on a pin ll and operated by the rotation of a spindle 42 carrying a bossed plate 43. The spindle is maintained steam-tight by a stuffing box 44 formed in the steam chest cover 30. The part 2'! is provided with an outlet 45 for the pressure fluid, this outlet being conveniently connected to a point beyond the superheater where such is used. The passage 35 admitting cleaning fluid to the central tube I, communicates with an apertured lantern member 41 in communication with apertures 48 formed in the wall of the tube I. The lantern member 47 is positioned between packing rings 49, one of which is seated on a washer 5f), the opposite face of the other packing seating on the annular end of a gland 5I, the whole acting as a stuffing box for the outer end of the central conduit I. Adjustment of the parts can be efiected by means of the adjusting screw 52. The outer end of the tubular-memberZ, is similarly provided with packingsi54'disposed on each side of alanternmember 55 directly communicating with an aperture 51 in the outer'tube 2. The combined packings are disposed between a packing washer 55 and the annular edge of the adjustable gland 55'.

' Ihe parts for effecting the rotation of the blower tubecomprise a pulley 62 mounted for rotation on the bushed stud the boss of the pulley being elongated to form the boss of a pinion 63 adapted'to mesh with a gear wheel 55,-

rigidly secured to the outer tubular member 2, whereby the rotation of the pulley E2 in either direction will give the necessary rotary movement to the central conduit I, the outer tubular member 2, and the nozzles 23 from which steam or other cleaning medium is emitted to the boiler tubes. A ball bearing 54* is positioned between the gear wheel 64 and the flange 24 of the frame 3 to facilitate this rotary movement.

The combined castings 3. and 2'1 carrying the centraland outer tubes I and 2 are resiliently supported within the wall box 4, rigidly mounted Within the boiler seating 5 by means of studs 67,

,the supporting means comprising. the flange 66 of the wall box 4. The upper part of the flange 66 is provided with shrouded lugs 53, the lower wall of each of which is bored to slidably receive a stud 69, the lower ends of which is screwedinto a boss Ill formed on the flange 24 of the frame casting 3. The upper part of each stud 69 is reduced in diameter and screwed to take a nut and washer 'II and 12 respectively, between which and the base of the cup a helical spring i3 is disposed, whereby the wall box acts as to resil- Figures 5 and 6 show in transverse section and on an enlarged scale a modified method of construction and assembly of the central conduit I, tubular member 2, and their associated webs and nozzles, Figure 5 showing the manner of inserting the central conduit I and its associated parts into the tubular member 2, while Fig. 6 shows the completed assembly.

In the modified construction the nozzles I6 are positioned at suitable intervals along the length of the central tube I, and the tubular member 2 is correspondingly bored at I! as shown to form a tight fit for the nozzles It, when the nozzles are inserted in the bores.

Short thimbles I8 are welded to the opposite face of the central tube I, and are positioned in alignment with internally screwed bores I9 in the tubular member 2. The tube I with its webs !2 and I3 nozzles I8 and thimbles 78 is then inserted into the tubular member 2 with the nozzles I6, bores TI and thimbles l8 and bores I9 in correct alignment. (See Fig. 5.) A screwed pin 86 is then screwed into the bores 73 and I9 by which means the central tube l is forced into the position shown in Figure 6, each nozzle I6 projecting through its corresponding bore in the outer tube 2. The webs I2 Is and the inner ends of the nozzles '56 and thimbles 18 are shown Welded to the inner tube I, (see Fig. 5) while the outer ends of the nozzles 76 and also the screwed pins 8! are welded to the tube 2. (See Fig. 6).

In operation and assuming that the parts are in the position shown in Figure 1, steam or other pressure fluid enters the chest 28 by way of the inlet 32, andpasses through the port 34, lantern 4'? and apertures 48 to the interior of the central tube I, and is emitted from the nozzles 23 to the tube sections to be cleaned. During this operation, a rotary movement can be imparted to both the central conduit I, and the outer tubular member 2 by rotation of the pulley 52, through pinion 55 and wheel 55 rigidly secured to the outer tubular member 2.

When the apparatus is inoperative as a blower, and it is desired to cool the tubes I and 2, the valve 45 is traversed by means of a rotary movement of the spindle 42, to'close the passage 34 and admit steam to the passage which thereupon flows through the passage I'I between the two tubes and returns by way of the passage It passing out through aperture 51, lantern 55, and outlet .46.

Where steam is used as the cooling medium its temperature is raised during its passage through the tubes to any desired degree of superheat, the steam admission being suitably regulated by means of the valve 40. The steam is then passed to a point beyond the superheater where such is used. Further, the steam leaving the tubes will have a higher pressure than the steam leaving the superheater, as the pressure drop through the cooling chambers will be less than the normal pressure drop across the superheater, thereby ensuring its free discharge into the steam range.

By forming my improved blower in this way, I provide effective means whereby the boiler or other tubes may be quickly cleaned of soot and other deposits, and further wherein the operative parts of the blower can be maintained in a relatively cool condition when the blower is not in use.

I wish it to be understood that the above construction is given by way of illustration only, and that various modifications may be made therein. For example, the central tube I can be eccentrically disposed within the external tubular member 2, and any form of two-way valve can be sub-. stituted for that hereinbefore described for admitting-steam, either to the central conduit or to the space between the central conduit and its outer tubular member. Any suitable operative means may be employed to efiect the rotation of the central conduit and the tubular member. In a further modification the resilient supporting means between the wall box and the supporting frame of the blower, can be dispensed with and the supporting frame rigidly secured to the flange of the wall boX by bolts, nuts, studs, or

the like, such modifications as these coming within the scope of the invention and being employed as may be found necessary according to the particular type of boiler, superheater, or the like,

to which the invention is to be applied.

What I claim and desire to secure by Letters Patent is:--

1. A fluid pressure operated blower for cleaning the tubes of steam generators and the like comprising a, casing adapted to be secured to the wall of the steam generator, two tubular members one of which passes through and extends from said casing into the steam generator, the second tubular member also fitting into the casing and being external of the first and in fixed relation thereto to define an annular space therebetween, a plurality of nozzles communicating with the interior of the first tubular member, a plurality of apertures in the wall of the second tubular member, said nozzles passing through said apertures, the first tubular member'being adapted to supply pressure medium only to said nozzles, diaphragms interposed between the outer tubular member and the inner tubular member to divide the said annular space into two'longitudinal passages, packing means in said casing for the ends of both tubular members, a chest in said casing for the pressure medium, an inlet for the pressure medium to said chest, two outlets for the pressure medium from said chest, one of which is in communication with the inner tubular member, and the other with one passage in the space between the tubular members, means common to both outlets for selectively admitting pressure medium either to the inner tubular uously from the inlet to the outlet through said passages when admitted thereto by said admitting means, and means for rotating said tubular members in unison.

2. A fiuid pressure operated blower for cleaning the tubes of steam generators and the like comprising a casing adapted to be secured to the wall of the steam generator, two tubular members one of which passes through and extends from said casing into the steam generator, the second tubular member also fitting into the casing and being external of the first and in fixed relation thereto to define an annular space therebetween, a plurality of nozzles communicating with the interior of the first tubular member, a plurality of apertures in the wall of the. second tubular member, said nozzles passing through said apertures, the first tubular member being adapted to supply pressure medium only to said nozzles, diaphragms interposed between the outer tubular member and the inner tubular member to divide the said annular space into two longitudinal passages, packing means in said casing for the ends of both tubular members, a chest in said casing for the pressure medium, an inlet for the pressure medium to said chest, two outlets for the pressure medium from said chest, one of which is in communication with the inner tubular member, and the other with one passage in the space between the tubular members, means common to both outlets for selectively admitting pressure medium either to the inner tubular member or to one passage formed by the division of the annular space, an outlet in said casing, said outlet communicating with the second passage in the space between said tubular members whereby the pressure medium may fiow continuously from the inlet to the outlet through said passages when admitted thereto by said admitting means, means for adjusting said first tubular member longitudinally in said casing, and means for rotating said tubular members in unison.

RICHARD IVOR MOSES. 

